Lawn sprinkler



W. VAN E. THQMPSON LAWN SPRINKLER Jan 4, 1927. fi 336 Filed August 7,1924 I N VEN TOR.

ATTORNEY.

8 By 97 wwgm Patented Jen. 4, 1927.

UNITED STATES WALTER VAN E. THOMPSON, OF LOS ANGELES, CALIFORNIA.

LAWN SPRINKLER.

Application filed August 7, 1924. Serial No. 730,564.

My invention relates to that class of lawn sprinklers which have a castbody with a slitted orifice attached to the end of a hose' plicationFig. 1, is a side elevation of mysprinkler. Fig. 2 is a top plan. Fig. 3is a section on the line 3-3 of Fig. 1.

Fig. 4 is an enlarged central longitudinal section.

Referring to the drawings the body 5 is formed by casting it fromsuitable metal with slot 6 and distribution chamber and threadedattaching chamber 7 therein. The lawn attaching spike 8 is secured tothe body at thetime it is' cast in the well known manner as bestillustrated in Fig. 4. In

the sprinklers manufactured by me I use zinc and in order to achieve theresult of an even distribution of the water which issues from slot 6 Ipunch and form up from sheet brass what I term a slot plate 9 which isplaced in the mould and the metal cast around the outside as shown inthe draw ings. The slot 10 of plate 9 is a little shorter than slot 6,as best shown in Fig. 3, being in the sprinklersmanufactured by me 21/64of an inch at each side for a sprinkler for a inch hose. The slots arepreferably at an angle of 60 to the longitudinal diameter of the bodyand are 6/64 of an inch wide at the top and 5/64 of an inch at thebottom.

The diameter of the body at the top of the a slot is 1 inches and theinside diameter at the slot is of an inch.

These dimensions I have found from practical tests give an evendistribution of the water issuing from theslot under a pressure of fivepounds and up. By slanting the slot downwardly to a like extent, Icouldpro-' duce a like result from a body cast from brass or other metal.

For distinction I will call the slot formed by plate 9 and body 5 a slotwith a stepped bottom. By a slot with a'stepped bottom is meant one atwhich the inner edges are in a plane' above the plane that passesthrough the-outer edges. I have foundby experiment that by making theinner ed es of the slot higher than the outer edges, t e higherinnerfedges cut off the flow of water sharpl and the distribution isuniform from a 1 portions of the slot.

Having described my invention I claim:

A lawn sprinkler comprising a tubularbody having at one end hoseattaching. means and closed at the other end and hav- 7 ing a wateroutlet slot extending angularly to the longitudinal axial line of thebody substantially 60 and intersecting the bore of said body, a curvedplate secured in said body inthe region of said slot and defining a partof said bore, said plate having a slot therein which registers with theslot in the body, the bottom of the plate slot being in a plane spacedabove that of'the bottom of 70 the body slot.

In witness that I claim the foregoing I hare hereunto subscribed my namethis 2nd day of August 1924.

WALTER VAN E. THOMPSON.

